| Summary of Identifiable Intangible Assets |
The following table presents details of our intangible assets which include acquired identifiable intangible assets and capitalized internal-use software costs: | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Weighted-
Average Estimated Useful Life (years) | | As of June 30, 2025 | | As of December 31, 2024 | | | | Gross Carrying
Amount | | Accumulated
Amortization | | Net Book Value | | Gross Carrying
Amount | | Accumulated
Amortization | | Net Book Value | | | | | (in thousands) | | Intangible assets subject to amortization: | | | | | | | | | | | | | | | Developed technology | 6.3 | | $ | 146,855 | | | $ | (103,039) | | | $ | 43,816 | | | $ | 146,855 | | | $ | (94,193) | | | $ | 52,662 | | | Customer relationships | 4.3 | | 12,000 | | | (11,667) | | | 333 | | | 12,000 | | | (10,363) | | | 1,637 | | | Trade names | 5.0 | | 2,619 | | | (2,619) | | | — | | | 2,619 | | | (2,559) | | | 60 | | | Total acquired intangible assets | | | $ | 161,474 | | | $ | (117,325) | | | $ | 44,149 | | | $ | 161,474 | | | $ | (107,115) | | | $ | 54,359 | | | Internal-use software | 3.0 | | 76,057 | | | (45,225) | | | 30,832 | | | 68,878 | | | (37,518) | | | 31,360 | | | Total intangible assets | | | $ | 237,531 | | | $ | (162,550) | | | $ | 74,981 | | | $ | 230,352 | | | $ | (144,633) | | | $ | 85,719 | |
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| Summary of Estimated Amortization Expense |
Estimated future amortization expense of the acquired identifiable intangible assets and completed capitalized internal-use software costs as of June 30, 2025 was as follows (in thousands): | | | | | | | 2025 (for the remaining six months) | $ | 16,369 | | | 2026 | 25,217 | | | 2027 | 12,826 | | | 2028 | 3,831 | | | 2029 | 3,243 | | | 2030 and thereafter | 4,409 | | | Total | $ | 65,895 | |
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